The U.S. NRC is holding a second public workshop on the technical basis for development of interim guidance on subsurface investigations supporting license termination under 10 CFR Part 20, Subpart E. This research effort focuses on survey design optimiza

The U.S. NRC is holding a second public workshop on the technical basis for development of interim guidance on subsurface investigations supporting license termination under 10 CFR Part 20, Subpart E. This research effort focuses on survey design optimization methods, data analysis techniques, and recommendations for associated software development to support subsurface investigations at decommissioning sites. A draft technical report has been developed and feedback received during the workshop will be considered in finalizing the report. Taking into consideration workshop and technical report findings, interim guidance will be developed by NRC staff in late 2022. The objective of the interim guidance is to improve transparency regarding acceptable methods to assess, evaluate, and manage risks associated with residual radioactivity in subsurface soils and groundwater.